Granted Patent
Utility
US 6,766,916 · App. 09/955,844
Tamper evidencing closure
Inventor:
Mike Ma
Patented Case
View Patent ↗
Granted: Jul 27, 2004
Filed: Sep 18, 2001
Inventor
Mike Ma
Assignee (at issue)
Portola Packaging, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.